(n.) Any species of sea duck of the genus Somateria, especially Somateria mollissima, which breeds in the northern parts of Europe and America, and lines its nest with fine down (taken from its own body) which is an article of commerce; -- called also eider duck. The American eider (S. Dresseri), the king eider (S. spectabilis), and the spectacled eider (Arctonetta Fischeri) are related species.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). eider. Retrieved September 20, 2026, from http://smartdefine.org/eider/definitions/2001903 |
| Chicago | Webster's. 2011. "eider" http://smartdefine.org/eider/definitions/2001903 (accessed September 20, 2026). |
| Harvard | Webster's 2011, eider, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/eider/definitions/2001903>. |
| MLA | Webster's. "eider" 27 May 2011. Web. 20 September 2026. <http://smartdefine.org/eider/definitions/2001903> |